v0.5.1 - Bug Fix

• Fixed a crash when a Boss is killed. This triggers a check to drop scrap which bosses don't do. Their SCRAP_CHANCE was set to 0. However, the random function can roll a 0 and the check was less than or equal too.  If this happened, the game tried to determine the SCRAP_VALUE to drop which wasn't defined. CRASH! FIX: Changed drop check function to less than and a defined default scrap value for all enemies of 0, just in case.
• Also added tracking the number of Neutrino Bombs and Nano Repairs collected.